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CVE-2026-20766— Milesight Cameras Heap-based Buffer Overflow

CVSS 8.8 · High EPSS 0.04% · P12
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I. Basic Information for CVE-2026-20766

Vulnerability Information
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Vulnerability Title
Milesight Cameras Heap-based Buffer Overflow
Source: NVD (National Vulnerability Database)
Vulnerability Description
An out-of-bounds memory access vulnerability exists in specific firmware versions of Milesight AIOT cameras.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
Milesight AIOT cameras 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Milesight AIOT cameras是中国星纵物联（Milesight）公司的一系列融合人工智能与物联网技术的智能监控摄像设备。 Milesight AIOT cameras存在安全漏洞，该漏洞源于越界内存访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
MilesightMS-Cxx63-PD 0 ~ 51.7.0.77-r12 -
MilesightMS-Cxx64-xPD 0 ~ 51.7.0.77-r12 -
MilesightMS-Cxx73-xPD 0 ~ 51.7.0.77-r12 -
MilesightMS-Cxx75-xxPD 0 ~ 51.7.0.77-r12 -
MilesightMS-Cxx83-xPD 0 ~ 51.7.0.77-r12 -
MilesightMS-Cxx74-PA 0 ~ 3x.8.0.3-r11 -
MilesightMS-C8477-HPG1 0 ~ 63.8.0.4-r3 -
MilesightMS-C8477-PC 0 ~ 48.8.0.4-r3 -
MilesightMS-C5321-FPE 0 ~ 62.8.0.4-r5 -
MilesightMS-Cxx72-xxxPE 0 ~ 61.8.0.5-r2 -
MilesightMS-Cxx62-xxxPE 0 ~ 61.8.0.5-r2 -
MilesightMS-Cxx52-xxxPE 0 ~ 61.8.0.5-r2 -
MilesightMS-Cxx66-xxxPE 0 ~ 61.8.0.5-r2 -
MilesightMS-Cxx66-xxxGPE 0 ~ 61.8.0.5-r2 -
MilesightMS-Cxx61-xxxPE 0 ~ 61.8.0.5-r2 -
MilesightMS-Cxx67-xxxPE 0 ~ 61.8.0.5-r2 -
MilesightMS-Cxx71-xxxPE 0 ~ 61.8.0.5-r2 -
MilesightMS-Cxx41-xxxPE 0 ~ 61.8.0.5-r2 -
MilesightMS-Cxx76-PE 0 ~ 61.8.0.5-r2 -
MilesightMS-Cxx65-PE 0 ~ 61.8.0.5-r2 -
MilesightMS-Cxx66-xxxG1 0 ~ 63.8.0.5-r3 -
MilesightMS-Cxx62-xxxG1 0 ~ 63.8.0.5-r3 -
MilesightMS-Cxx72-xxxG1 0 ~ 63.8.0.5-r3 -
MilesightMS-CQxx31-xxxG1 0 ~ CQ_63.8.0.5-r1 -
MilesightMS-CQxx68-xxxG1 0 ~ CQ_63.8.0.5-r1 -
MilesightMS-CQxx72-xxxG1 0 ~ CQ_63.8.0.5-r1 -
MilesightMS-Nxxxx-NxE 0 ~ 7x.9.0.19-r5 -
MilesightMS-Nxxxx-xxC 0 ~ 7x.9.0.19-r5 -
MilesightMS-Nxxxx-xxE 0 ~ 7x.9.0.19-r5 -
MilesightMS-Nxxxx-xxG 0 ~ 7x.9.0.19-r5 -
MilesightMS-Nxxxx-xxH 0 ~ 7x.9.0.19-r5 -
MilesightMS-Nxxxx-xxT 0 ~ 7x.9.0.19-r5 -
MilesightPMC8266-FPE 0 ~ PO_61.8.0.4_LPR -
MilesightPMC8266-FGPE 0 ~ PO_61.8.0.4_LPR -
MilesightPM3322-E 0 ~ PI_61.8.0.3_LPR-r3 -
MilesightTS4466-X4RIPG1 0 ~ T_63.8.0.4_LPR-r3 -
MilesightTS5366-X12RIPG1 0 ~ T_63.8.0.4_LPR-r3 -
MilesightTS8266-X4RIPG1 0 ~ T_63.8.0.4_LPR-r3 -
MilesightTS4466-X4RIVPG1 0 ~ T_63.8.0.4_LPR-r3 -
MilesightTS4466-RFIVPG1 0 ~ T_63.8.0.4_LPR-r3 -
MilesightTS8266-X4RIVPG1 0 ~ T_63.8.0.4_LPR-r3 -
MilesightTS8266-RFIVPG1 0 ~ T_63.8.0.4_LPR-r3 -
MilesightTS4466-X4RIWG1 0 ~ T_63.8.0.4_LPR-r3 -
MilesightTS8266-X4RIWG1 0 ~ T_63.8.0.4_LPR-r3 -
MilesightTS5510-GVH 0 ~ T_47.8.0.4_LPR-r7 -
MilesightTS5510-GH 0 ~ T_47.8.0.4_LPR-r6 -
MilesightTS5511-GVH 0 ~ T_47.8.0.4_LPR-r6 -
MilesightTS2966-X12TPE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightTS4466-X4RPE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightTS5366-X12PE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightTS8266-X4PE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightTS2966-X12TVPE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightTS4466-X4RVPE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightTS5366-X12VPE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightTS8266-X4VPE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightTS4441-X36RPE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightTS4441-X36RE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightTS4466-X4RWE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightTS8266-X4WE 0 ~ T_61.8.0.4_LPR-r3 -
MilesightMS-C2964-RFLPC 0 ~ T_45.8.0.3-r9 -
MilesightMS-C2972-RFLPC 0 ~ T_45.8.0.3-r9 -
MilesightMS-C2966-RFLWPC 0 ~ T_45.8.0.3-r9 -
MilesightTS2866-X4TPC 0 ~ T_45.8.0.3-r9 -
MilesightTS2866-X4TVPC 0 ~ T_45.8.0.3-r9 -
MilesightTS2866-X4TGPC 0 ~ T_45.8.0.3-r9 -
MilesightTS2841-X36TPC 0 ~ T_45.8.0.3-r9 -
MilesightTS2841-X36TPC/W 0 ~ T_45.8.0.3-r9 -
MilesightTS2867-X5TPC 0 ~ T_45.8.0.3-r9 -
MilesightTS2961-X12TPC 0 ~ T_45.8.0.3-r9 -
MilesightTS8266-FPC/P 0 ~ T_45.8.0.3-r9 -
MilesightMS-C2966-X12RLPC 0 ~ T_45.8.0.3-r9 -
MilesightMS-C2966-X12RLVPC 0 ~ T_45.8.0.3-r9 -
MilesightMS-C5366-X12LPC 0 ~ T_45.8.0.3-r9 -
MilesightMS-C5366-X12LVPC 0 ~ T_45.8.0.3-r9 -
MilesightMS-C5361-X12LPC 0 ~ T_45.8.0.3-r9 -
MilesightMS-Cxx66-xxxxGOPC 0 ~ 45.8.0.2-AIoT-r4 -
MilesightSC211 0 ~ C_21.1.0.8-r4 -
MilesightSP111 0 ~ 52.8.0.4-r5 -
MilesightMS-Cxx66-RFIPKG1 0 ~ 63.8.0.4-r1-NX -
MilesightMS-Cxx72-RFIPKG1 0 ~ 63.8.0.4-r1-NX -
MilesightMS-Cxx66-FIPKG1 0 ~ 63.8.0.4-r1-NX -
MilesightMS-Cxx72-FIPKG1 0 ~ 63.8.0.4-r1-NX -

II. Public POCs for CVE-2026-20766

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III. Intelligence Information for CVE-2026-20766

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Same Patch Batch · Milesight · 2026-04-27 · 5 CVEs total

CVE-2026-326449.8 CRITICALMilesight Cameras Use of Hard-coded Cryptographic Key
CVE-2026-277858.8 HIGHMilesight Cameras Use of Hard-coded Credentials
CVE-2026-287477.1 HIGHMilesight Cameras Authorization Bypass Through User-Controlled Key
CVE-2026-326496.8 MEDIUMMilesight Cameras OS Command Injection

IV. Related Vulnerabilities

Same product: MS-Cxx63-PD
Same vendor: Milesight
Same weakness: CWE-122

V. Comments for CVE-2026-20766

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